Bug 856743 (CVE-2012-4415)

Summary:	CVE-2012-4415 libguac: Stack-based buffer overflow by protocol handling in guac client plug-in
Product:	[Other] Security Response	Reporter:	Jan Lieskovsky <jlieskov>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	negativo17
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-10-03 07:06:28 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	856746, 856747
Bug Blocks:

Description Jan Lieskovsky 2012-09-12 17:42:24 UTC

A stack based buffer overflow flaw was found in guac client plug-in protocol handling functionality of libguac, a common library used by all C components of Guacamole. A remote attacker could provide a specially-crafted protocol specification to the guac client plug-in that, when processed would lead to guac client crash (denial of service).

References:
[1] http://www.openwall.com/lists/oss-security/2012/09/11/3
[2] http://www.openwall.com/lists/oss-security/2012/09/11/7

Upstream patch:
[3] http://guac-dev.org/trac/changeset/7dcefa744b4a38825619c00ae8b47e5bae6e38c0/libguac

Comment 1 Jan Lieskovsky 2012-09-12 17:45:21 UTC

This issue affects the versions of the libguac package, as shipped with Fedora release of 16 and 17. Please schedule an update.

--

This issue affects the version of the libguac package, as shipped with Fedora EPEL 6. Please schedule an update.

Comment 2 Jan Lieskovsky 2012-09-12 17:46:19 UTC

Created libguac tracking bugs for this issue

Affects: fedora-all [bug 856746]
Affects: epel-6 [bug 856747]

Comment 3 Fedora Update System 2012-09-24 03:23:34 UTC

libguac-0.6.3-1.fc18, libguac-client-vnc-0.6.0-8.fc18, libguac-client-rdp-0.6.1-2.fc18, guacd-0.6.1-3.fc18, guacamole-common-0.6.1-2.fc18, guacamole-ext-0.6.1-2.fc18, guacamole-common-js-0.6.1-2.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 4 Fedora Update System 2012-09-26 08:52:13 UTC

libguac-0.6.3-1.fc17, libguac-client-vnc-0.6.0-8.fc17, libguac-client-rdp-0.6.1-2.fc17, guacd-0.6.1-3.fc17, guacamole-common-0.6.1-2.fc17, guacamole-ext-0.6.1-2.fc17, guacamole-common-js-0.6.1-2.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2012-09-26 09:10:23 UTC

libguac-0.6.3-1.fc16, libguac-client-vnc-0.6.0-8.fc16, guacd-0.6.1-3.fc16, guacamole-common-0.6.1-2.fc16, guacamole-ext-0.6.1-2.fc16, guacamole-common-js-0.6.1-2.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.